Improvement in railroad-car brakes



UNi-TED STATES 1PA-TENT OFFICE,

J.. H. GHAMPLIN,l 0F ESSEX, CONNECTICUT.

AnynaovElyn:NT IN 'RAILROAD-CAR' BRAKES.'

Specification forming part of' Letters Patent o, 45,925, dated January24, 1865.

To all whom it may concern,.- j

Be* it 'known that I, J. H. UHAMPLIN, of llssex,`in the county ofMiddlesex and Sta-te 'of Connecticut, .have invented a new and-'use--ful Improvement inBrakes for Railroad-Cars;

.and I do herebyl declare the following -to be a full, clear, and, exactdescription of the same, when 'iwi panying drawings and theletters ofreference marked thereon,an"d which said drawings eonstitujtefpart ofthis speciiication,.and represent, Aiii-l- 'y Figure1l,ian.'end View ofn i'y brake7 and in Fig, 2 avertical central section of the same.' iMyinven'tion relates to that part of a railro'adfcar .brake employed tocreate friction upon'f the wheel, and it consists in the employment 'otstone or other. mineral substance in thelconstruction of thefriction-block. 'v'.,lsoinorefully'illustrate my invention, I will.proceed to fully describe the sa in connec-I tion with the accompanyingdrawings.

A represents acommon car-Wheel; B, theV beam ofthe brake, towhichthefriction-block is'nttached. C is ablock of stone or other suitablemineral substance capable of pro- -duci'ng great -frictionwhenapplied tothe sur- :face ,of the vwheel. I set the said block in a ca'se'ior box,D, fixed to thebeam B. The lower end of the said box I niakeinelinedupward,

as seen inFigfZ, to prevent block from tipping forwad,and set plate,'E,in the 1 saidbox back ofthe block 0,-the block resting thereonandprojectingalittle from the box. By constant use the block will bewornaway, then by means of 'the screws a a forceA the plate and blockout a suicientdistauce for further use, and-s0 on' untiitheblersl;'isjnemly--l worn out. Y

My'brake may be operated to bear against i the wheel in any of thecommonways.i That is no part of my invention.

The principal advantages of my invention over Ordinary frictioinbloclrsare, a greatly-increased friction from the saine yamount of powerapplied, and the adjustment of the block as it' wears away.

Having` therefore described my invention, what I'claim as new anduseful, and desire to secure by LettersA Patent, is-f' A friction-blockfor'lrailroadcar brakes,

forined'frm stone or its equivalent, combined with and made adjustableby means ofthe screws a `ouin the case D, and arranged to operatesubstantially in lthe Vmanner and for the purpose speciled.-

5 J.'H; CHAMPL* Witn esses JOHN EARLE, -RUFUs SANFORD.

